public ActionResult Index()
{
var nutData = new NutData
{
Timestamp = DateTime.Now,
Address = IPAddress.Parse(Request.ServerVariables["REMOTE_ADDR"]),
Counter = ++Globals.Counter,
Entropy = new byte[4]
};
// just to keep the database size down, delete all nuts older than 2 minutes, but only every 10 page requests
if (Globals.Counter % 10 == 0)
{
var deleted = _nutRepository.DeleteOlderThan(DateTime.Now.AddMinutes(-2));
Console.WriteLine("{0} nuts deleted", deleted);
}
var rng = new RNGCryptoServiceProvider();
rng.GetBytes(nutData.Entropy);
var nut = HttpServerUtility.UrlTokenEncode(_sqrlServer.GenerateNut(Globals.AesKey, Globals.AesIV, nutData));
var url = string.Format("{0}/{1}",
Url.Action("Sqrl",
"Login",
null,
"sqrl",
Request.Url.Host + ":" + Request.Url.Port),
nut);
_nutRepository.Create(nut);
var barcodeWriter = new BarcodeWriter
{
Format = BarcodeFormat.QR_CODE,
Options = new EncodingOptions
{
Width = 400,
Height = 400
}
};
var image = barcodeWriter.Write(url);
MemoryStream stream = new System.IO.MemoryStream();
image.Save(stream, ImageFormat.Png);
byte[] imageBytes = stream.ToArray();
var model = new SqrlLoginModel
{
Url = url,
QrCode = Convert.ToBase64String(imageBytes),
Nut = nut
};
return(View(model));
}
